Proofs

Determine if the triangles are congruent, if "yes" state the theorem.

• not congruent

• yes, SSS

• yes, SAS

• yes, ASA

Are the triangles congruent, if yes, why?

• SSS

• SAS

• ASA

• Not Congruent

State if the two triangles are congruent.  If they are, state how you know.

• A

• B

• C

• D

Can the triangles be proven congruent?  If so, how?

• ASA

• AAS

• SAS

• Cannot be proven congruent

What postulate proves these triangles congruent?

• SAS

• CPCTC

• AAS

• ASA

Given: ∠1 and ∠3 are vertical angles. What should you conclude by the vertical angles theorem?

• undefined andundefined are right angles.

Identify the missing statement or reason

• Reflexive Property

• Definition of Midpoint

• Given

• Vertical Angles Theorem

If DA bisects IE, then

• ID=ED

• IA=EA

• <IDA=<EDA

• <IAD and <EAD are right angles

Are these triangles congruent? If so, state the rule which you used to determine congruence.

• SAS

• SSS

• Both SSS and SAS

• Not necessarily congruent

ΔAEB ≅ ΔCED by...

• SAS

• ASA

• AAS

• SSS